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Bug#1033329: Bad symbol versions on 32-bit architectures

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Source: linux
Version: 6.1.20-1
Severity: important
Tags: upstream patch

On 32-bit architectures, many symbol versions (CRCs) are recorded in
Module.symvers as 0x7fffffff.

This is a regression, and I have bisected it to the upstream change:

commit f292d875d0dc700b3af0bef04c5abc1dc7b3b62c
Author: Masahiro Yamada <masahiroy@kernel.org>
Date:   Fri May 13 20:39:21 2022 +0900

    modpost: extract symbol versions from *.cmd files

modpost now reads CRCs from .*.cmd files, parsing them using strtol().
This is inconsistent with its parsing of Module.symvers and with their
definition as *unsigned* 32-bit values.

strtol() clamps values to [LONG_MIN, LONG_MAX], and when building on a
32-bit system this changes all CRCs >= 0x80000000 to be 0x7fffffff.

Ben.

-- System Information:
Debian Release: bookworm/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'stable-updates'), (500, 'stable-security'), (500, 'oldstable-updates'), (500, 'unstable'), (500, 'stable'), (500, 'oldstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.1.0-5-amd64 (SMP w/2 CPU threads; PREEMPT)
Kernel taint flags: TAINT_WARN
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

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Bug#1033329: Bad symbol versions on 32-bit architectures Ben Hutchings <ben@decadent.org.uk> - 2023-03-22 19:30 +0100

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